<template>
    <el-container class="home-container">
        <!-- 头部-->
        <el-header>
            <div>
                <img src="../assets/logo.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <el-container>
            <!-- 侧边栏-->
            <el-aside :width="isCollapse?'64px':'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单-->
                <el-menu :default-active="activePath" router :collapse-transition="false" :collapse="isCollapse" :unique-opened="true" background-color="#333744" text-color="#fff" active-text-color="#409Eff">
                    <!-- 一级菜单-->
                    <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                        <!--一级菜单模板区域 -->
                        <template slot="title">
                            <!--图标-->
                            <i :class="iconsObj[item.id]"></i>
                            <!--文本-->
                            <span>{{item.authName}}</span>
<!--                            <span>导航1</span>-->
                        </template>
                        <!-- 二级菜单-->
                        <el-menu-item @click="saveNavState('/'+subItem.path)" :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id">
                            <template slot="title">
                                <!--图标-->
                                <i class="el-icon-menu"></i>
                                <!--文本-->
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>

                </el-menu>
            </el-aside>
            <!-- 主体-->
            <el-main>
                <!--路由占位符-->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
    export default {
        data(){
            return{
            //    左侧菜单数据
                menulist:[],
                iconsObj:{
                    '125':'iconfont icon-users',
                    '103':'iconfont icon-tijikongjian',
                    '101':'iconfont icon-shangpin',
                    '102':'iconfont icon-danju-tianchong',
                    '145':'iconfont icon-baobiao'
                },
                isCollapse:false,
                //被激活的链接地址
                activePath:''
            }
        },
        created(){
            this.getMenuList();
            this.activePath=window.sessionStorage.getItem('activePath');
        },
        methods:{
            //退出按钮功能
            logout(){
                //清空token
                window.sessionStorage.clear();
                //跳转到登录页
                this.$router.push('/login');
            },
            //获取左侧的菜单栏
            async getMenuList(){
                const {data:res} = await this.$http.get('menus');
                if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
                this.menulist=res.data;
                // console.log(res);
            },
            //点击按钮切换菜单的折叠与展开
            toggleCollapse(){
                this.isCollapse=!this.isCollapse;
            },
            //保存连接的激活状态
            saveNavState(activePath){
                //保存路径到sessionStorage
                window.sessionStorage.setItem('activePath',activePath);
                this.activePath=activePath;
            }
        }
    }
</script>

<style scoped>
.home-container{
    height: 100%;
    /*color: #fff;*/
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
}
.el-header div{
    display: flex;
    align-items: center;
}
.el-header div span{
    margin-left: 15px;
}
.el-header div img{
    height: 60px;
    width: 60px;
}
.el-aside{
    background-color: #333744;
}
.el-aside .el-menu{
    border-right: none;
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    text-align: center;
    color: #fff;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
